Safety-valve.



Patented lune: n, |901.

F. c.A BILLINGS. SAFETY v ALvE. (Application lgd July 12, 1900.)

(No ll'odal.)

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muh Pcrtns on.. mura-Llwo. 'wumn UNITED STATES "PATENT OFFICE.

FREDERIC C.l BILLINGS, OF HARTFORD, CONNECTICUT, ASSIGNOR TO AMERICANBICYCLE COMPANY, OF NEW. YORK, N. Y., AND JERSEY CITY, NEW JERSEY.

`SAFETY-VALVE.`

SPECIFICATION forming part 0f Letters Patent No. 676,118, dated. Jirl11, 1901.

l Application led July l2, 1900. Serial No. 23,292. (No model.)

T0 all whom t may concern: l

Be it known that I, FREDERIC C. BILLINGs, a citizen of the UnitedStates, residing in Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inSafety-Valves, of which the following is a specification.

My invention relates to safety-valves; and" it has for its object asimple and compact construction of such a valve whereby it may bereadily controlled by the engineer to relieve the pressure in thepressure-generator when desired.

In the accompanying drawings, in which like numerals designate likeparts throughout the several views, Figure 1 is a plan view of myimproved safety-valve. Fig. 2 is a longitudinal vertical section showingthe valve closed. Fig. 3 is a side elevation, partially in section.showing thevalve opened. Fig. 5 is a perspective view of the valve-plug.Fig. 6 is a perspective view of a ring for adjusting the valve-plug.

Referring to the drawings, the numeral 1 designates, in a general way,the barrel of my improved safety-valve, which consists of a sleeve 2,threaded near one end at 2', and a tubular body portion 3, enlarged atone end at 3' and having a shoulder 32, constituting a seat for thesleeve 2, which its tightly over the reduced portion 3 and makes a tightjoint with said shoulder 32 and a chamber 34. Threaded into the upperend of sleeve 2, or it maybe connected in other ways,'if desired, is ahead 4, having a perforation 4' and a iiange 42, and to this flange issecured aliandle 5 for manipulating the same, or said head may have aform suitable to be grasped by a wrench, as shown at 43, Fig. 1. end theenlarged part 3' of the tubular body portion 3 is threaded to receive laperforated head 6, provided with a valve-seat 6 at one` end and with aiiange 62 near its opposite end, which ilange iits with a tight jointagainst the end of the enlarged portion 3', and to this head isconnected a pipe 7, leading to a pressure-generator of any desired kind.Threaded into an elbow 8, projecting from the enlarged and chamberedpart 3', is a blow-olf pipe 9,

Fig. 4 is a view similar toFig. 2,

At its lower Yscrew 13, inserted in the enlarged part 32 of the tubularbody portion 3, said screw enter ing any one of a series of recesses 122in the periphery of the ring.

Frequently it happens that the valves stick in their seats, and shouldthis occur in the present construction by withdrawing the screw 13 andinserting a pritchel or other small tool through the opening vacated bythe screw into one of the recesses 122 the ring 12 may be adjusted tofree the valve from its seat and-also by contact with the iiange 103 ofthe valve to keep it from such close engagement with said seat that` itsefficiency will be affected.

Fitted in a threaded bore of the part 3 is a gland 14, secured by ajam-nut 15, and passing through this gland is a rod 16, inserted in avsocket of the valve-plug 10 at its lower end :and provided with acollar 16', intermediate vling saidrod to the rod 16, connected to thevalve.` To preserve a fluid-tight joint between the parts, apacking-ring 21 is set into the sleeve 2, as shown in Figs. 1 and 4.

Myinvention operates as follows: Undernor- `mal conditions the spring18, through the devices described,holds the valve-plug 10 tightlyagainst its seat; but should the pressure in .the generator increaseabove the safetylimit the valve will be forced from its seat against IOOthe stress of the spring 18 to permit the excess of pressure to pass oftthrough the pipe 9, and-when this action of the valve takes place thepin 17 travels in the slots of the stirrup 20. Should the engineer besuspicious that the pressure is exceeding a safe limit and that thevalve fails to act, by grasping the handle 5 and turning the head thecan compress the spring 18 and relieve the valveplug of its pressure,thereby permitting the steam to blow off through pipe 9 until normalpressure, as denotedby the pressuregage, is reestablished, and then byreversing the movement of the screw-threaded head the spring will bereleased and allowed to press the valve-plug to its seat. i

Changes may be madein many of the parts, and the invention is notlimited to the precise details shown and described.

Having thus described myinvention, what I claim, and desire to secure byLetters Patent, is-

1. In a safety-valve, the combination with the barrel, of a valve-plug,means for holding v the valve-plug to its seat, and a device mounted forturning movement on the barrel andfoperatively connected with saidvalveholdi-ng means to relieve the pressure of the salnelon thevalve-plug.

2. In a safety-valve, the combination with a Atubular body portion, of asleeve upon said body portion, said sleeve being screw-threaded, a headin threaded engagement with said sleeve, a valve-plug, a valve-seat inthe tubular bodyportion andmeans to hold said valveplug to its seat,said means being operatively connected with said head whereby thepressure of said means upon the valve-plug is relieved by turning saidhead.

3. In a safety-valve, the combination,\vith a tubular body portionhaving a reduced stem, of a head connected to said tubular body portionand having a valve -seat; a valve-plug fitting the valve-seat; a sleevetted over the stem of the body portion and having a screw-thread; athreaded head connected with said sleeve; and means controlled by saidhead to hold the valve-plug to its seat.

4. In a safety-valve, the combination, with a tubular body portionhaving a reduced stem; a head having a valve-seat lnovably connectedwith said tubular body portion; a pressure-pipe communicating with aperforation in said head; a valve-plug loc'ated in the valve-seat; a rodhaving a collar and engaging the valve-plug; a spring located betweensaid collar and the end of the reduced portion of the tubular bodyportion; a sleeve surrounding said reduced portion; a head movablymounted in the sleeve; and means connecting said head with said rod.

5. In a safety-valve, the combination, with a barrel, of headsat eachend of said barrel,

one 'of said heads communicating with a pressuregenerator; a valve-seatin said lastnarned head; a Valve-plug having a Iiuted stem and a flangedhead seated in the valveseat; a rod engaging said valve-plug; a springfor normally keeping the valve-plug closed; and means for withdrawingsaid rod against the action of the spring.

6. g In a safety-valve, the combination, with a tubular body portionhaving a reduced stem, of a head fitted in said body portion andcarrying a valve-seat; a valve-plug having a conical surface fitted insaid valve-seat; a rod engaging the valve-plug and having a collar; agland threaded into the reduced stem of the body portion; a coiledspring between said gland and the collar of the rod; a sleevesurrounding the reduced stem of the tubular body portion; a headthreaded to said sleeve; and means for connecting said head with saidrod.

7. In a safety-valve,the combination, with a tubular body portion havinga stem ot reduced diameter, of a head threaded upon saidv body portionand carrying a valve-seat; a iianged valve-plug fitting in saidvalve-seat; a rabbeted ring surrounding said valve-plug and secured tothe head; a rod having a collar; a gland threaded into the upper end ofthe tubular body portion; a coiled springlecated between saidgland andthe collar on the rod; a sleeve surrounding the reduced part of thetubular body portion; a head threaded to said sleeve; and a rod carriedby the head and having a slotted stirrup connected with the first-namedrod.

8. In a safety-valve, the combination, with a tubular body portionhaving a reduced stem, of a head threaded into said tubular body portionand havinga valve-seat a valveplug having a flanged head, a conical faceand a iiuted stem; a ring threaded upon said head; a rod engaging thevalve-plug and having a collar; a coiled spring surrounding the rod andbearing against the collar at one end; a gland fitted into the reducedpart of the body portion and against which the other eX- tremity of thecoiled spring bears; a sleeve surrounding the reduced stem of thetubular body portion and having an internal screwthread at its upperend; a head having an external screw-thread fitted in said sleeve; a rodhaving a slotted stirrup connected to said head; and a pin connectingsaid rod and the rst-named rod.

9. In a safety-valve, the combination with a barrel, a valve-seat and avalve-plug, of a rod, and spring for holding said valve-plug to itsseat, a slotted rod engaging the firstnamed rod, and a threaded headengaging said slotted rod.

FREDERIC U. BILLINGS.

Vitnesses:

F. O. BLAND, O. E. BILLINGs.

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